Stovepipe-damper.



A. OHNEMUS.

STOVEPIPB DAMPER. APPLmATIon-r'unn APR. 16,1908.

Patented Oct. 20, 1908.

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UNITED STATES PATENT onirica.

ANTON OHNEMUS, OF QUINOY, ILLINOIS, ASSIGNOR TO EXCELSIOR STOVE Lt MANUFACTURING COMPANY, OF QUINOY, ILLINOIS, A CORPORATION.

STOVE PIPE-D AMPER.

To all whom 't may concern:

Be 1t known that I, ANTON OHNEMUS, a

citizen of the United States of America,

`it has for its object a combined device of the description named, whereby,- by the operation of a'single handle, the air inlet damper may be opened at the same time that the cut-off damper blade is moved into closed posit-ion, thus providing for the admission of air into the stove pipe to carry off the gases of combustion and also to check the fire in a stove to which the stove pipe containing my damper is applied. Inversely, a single operation of the damper serves to move the cut-off damper blade into open position and to close the air inlet damper.

It is a fact well known that the draft in chimneys of many buildings in which stoves are used is too violent for the proper burning of a fire in a stove connected with the chimneys and means for decreasing the draft is necessary. My damper provides for the checking of the draft in any desired degree.

Figure I is an elevation of a fragment of a stove pipe with my damper applied thereto, the cutoff damper blade being shown in closed position and the air inlet damper being open. Fig. II is a cross section taken on line II-II, Fig. I. Fig. III is a vertical section taken on line III-III, Fig. I. Fig. IV is a view similar to Fig. III with the cut-ofi'i damper blade and air inlet damper in intermediate positions.

In the accompanying drawings: A designates a fragment of a stove pipe having a circular opening a to which my damper is shown applied.

l designates a stationary air inlet damper plate that is formed with an annular flange 1et fitted into the circular opening a of the stove pipe, is fixed to the stove pipe A by means of bolts lb and is provided with segmental apertures 2 one of said apertures having end recesses 2a.

3 is a rotatable air inlet damper plate that is formed with a radial reinforce 3 and Specification of Letters Patent.

Application filed April 16, 1908.

Patented oct. 2o, 1908.

`serial No. 427,312.

spaced lugs 3b and is located within the annular flange la against the inner face of the stationary damper plate and is provided with segmental apertures t which are adapted to register with the segmental apertures in said stationary plate.

5 is a single radial handle carried by the rotatable damper plate and extending through one of the segmental apertures in the stationary plate so that it is con- Vveniently accessible at the exterior of the damper for the manipulation of said rotatable plate. The radial handle 5 has a shank 5a received by the end recesses 2a.

The rotatable plate 3 is connected to the stationary plate l by a pivot pin 6 that extends through the stationary plate and is surrounded exteriorly of the damper by a sleeve 7 which contains a spring 8 that serves to force the pin outwardly and maintain the rotatable damper plate in close contact with the stationary damper plate in order that the rotatable plate will not turn accidentally.

9 designates a cut-off damper blade located within the stove pipe A. This cut-off damper blade is provided with an arm l0 that is secured by suitable means, such as a bolt 1l to the radial reinforce 3a of the rotatable air inlet damper 3 between the spaced lugs 3b, so that said blade will partake of whatever movement is imparted to said rotatable plate. The blade 9 is 4so attached to the rotatable plate that it will extend in a position transversely of the stove pipe when the segmental apertures l in the rotatable plate 3 are in registration with the segmental apertures 2 in the stationary plate 1 and will extend vertically in the stove pipe when said segmental apertures are out of registration and the air inlet damper is closed.

It will be seen that when, in the practical use of my damper, the parts are in the positions illustrated in Figs. I to III inclusive, the cut-off damper blade 9 serves to restrict the degree of draft through the stove pipe in the manner usual in the use of such damper blades, and that air may enter into the stove pipe through the segmental apertures in the air inlet damper to further check the draft and cause the product of combustion to pass through the stove pipe. Then, if it is desired to increase the draft in the stove pipe, the cut-off damper is shifted to the desired degree and the air inlet damper is closed or partly closed by the manipulation of the single handle 5 carried by the rotatable air inlet damper plate. A reverse movement of the single handle carries the parts back to their previous positions or to any intermediate position.

Claims:

l. The combination, With a stove pipe; of a rotatable inlet damper plate, the cut off damper plate carried by the inlet damper plate, the stationary inlet damper plate, the pivot pin, and the spring around the pivot pin, which serves to hold the rotatable plate against the stationary plate and prevent accidental movement of either of the movable dampers.

Q. A stove pipe damper comprising a stationary damper plate having apertures, a rotatable damper plate having apertures and a radial handle extending through one of the apertures of the stationary damper plate, a pivot pin connecting the damper plates, a spring surrounding the pivot pin between the stationary damper plate and the outer head of the pivot pin and a cut off damper blade having an arm secured to the rotatable damper plate.

3. A stove pipe damper comprising a stationary damper plate having apertures and an annular flange, a rotatable damper plate having apertures and a radial handle eX- tending through one of the apertures of the stationary damper plate, a pivot pin connecting the damper plates, a sleeve mounted upon the pivot pin, between the stationary damper plate and the outer head of the pivot pin, a spring surrounding the pivot pin Within the sleeve, and a cut ott damper blade having an arm secured to the rotatable damper plate.

4L. A stove pipe damper comprising a stationary damper plate having apertures, a rotatable damper plate having apertures, a radial reinforce and a radial handle extendingthrough one of the apertures of the stationary damper plate, a pivot pin connecting the damper plates, and a cut oft damper blade having an arm secured to the radial reinforce of the rotatable damper plate.

5. A stove pipe damper comprising a stationary damper plate having apertures, a rotatable damper plate having apertures, spaced lugs, and a radial handle extending through one of the apertures of the stationary damper plate, a pivot pin connecting the damper plates, and a cut-off damper blade having an arm secured between the spaced lugs to the rotatable damper plate.

(i. A stove pipe damper comprising a stationary damper plate having apertures, one of the apertures having recesses, at its opposite ends, a rotatable damper plate having apertures and a radial handle having a stem and extending through the recessed aperture so as to enable its stem to be received by the end recesses thereof, a pivot pin connecting the damper plates, and a cut-oli damper blade having an arm secured to the rotatable damper plate.

ANTON oHNEMUs.

In presence of THEO. EHRHART, lV. J. FISHER. 

